Sudan launches major attack on South Sudan

"...But the fact that there was heavy ground fighting confirms that the conflict did not end after South Sudan pulled out of Heglig, the disputed oil field it captured this month, sparking international condemnation.
The South Sudanese government said it withdrew from the battered oil and military outpost due to diplomatic pressure.
"We can't be a pariah state when we are not even one year old," South Sudanese Vice President Riek Machar said in an interview in Bentiu on Saturday..."